The official National Weather Service forecast for Amasa — 46.2321°N, 88.4508°W, 178.2 miles from I-75. Forecasts here are written by NWS MQT, this county’s forecast office.
| Iron County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 21 | 26 | 37 | 50 | 65 | 74 | 78 | 76 | 69 | 54 | 39 | 26 | 51 |
| Avg low °F | 4 | 3 | 13 | 26 | 38 | 48 | 52 | 50 | 44 | 33 | 23 | 11 | 29 |
| Precip in | 1.4 | 1.3 | 1.8 | 2.9 | 3.1 | 3.9 | 3.5 | 3.2 | 3.4 | 3.3 | 2.0 | 1.8 | 31.6 |
1996–2025 normals for Iron County — the climate division Amasa sits in. All-time county record high 97.5°F (1977-07-20); record low -39.3°F (1996-02-03). Source: NOAA / National Weather Service.